Red Head Stud Anchor 5/8 X 5 Inch are bottom-bearing, hammer-driven anchors. Stud Anchors feature a bolt body and pre-assembled expander plug, and should be installed with carbide tipped hammer drill bits. These stud anchors are fast and easy to install, and can be installed directly through a fixture. They have the same drill size as anchor size, have a bottom-bearing design that is ideal for jacking and leveling applications, and have a hammer-driven expansion design that eliminates torque requirements, for dependable holding capacity. The stud anchors have external threads for easy equipment setting, and a stamped part number on body. Specs: Hole or Bit Size - 5/8 inch; Threads per Inch - 11; Overall Length - 5 inches; Stud Length - 3 inches; Thread Length - 2-1/4 inch; Min. Embedment - 2-3/8 inches.